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Message-ID: <20200513195814.GH650568@tuxdriver.com>
Date: Wed, 13 May 2020 15:58:14 -0400
From: "John W. Linville" <linville@...driver.com>
To: Michal Kubecek <mkubecek@...e.cz>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH ethtool 0/2] improve the logic of fallback from netlink
to ioctl
On Wed, Apr 29, 2020 at 12:30:00AM +0200, Michal Kubecek wrote:
> At the moment, ethtool falls back to ioctl implementation whenever either
> in response to request type not implemented in kernel or netlink interface
> is unavailable or netlink request fails with EOPNOTSUPP error code. This is
> not perfect as EOPNOTSUPP can have different meanings and we only want to
> fall back if it is caused by kernel lacking netlink implementation of the
> request. In other cases, we would needlessly repeat the same failure trying
> both netlink and ioctl.
>
> These two patches improve the logic to avoid such duplicate failures and
> improve handling of cases where fallback to ioctl is impossible for other
> reasons (e.g. wildcard device name or no ioctl handler).
>
> Michal Kubecek (2):
> refactor interface between ioctl and netlink code
> netlink: use genetlink ops information to decide about fallback
>
> ethtool.c | 51 +++---------
> netlink/extapi.h | 14 ++--
> netlink/monitor.c | 15 +++-
> netlink/netlink.c | 193 ++++++++++++++++++++++++++++++++++++++-------
> netlink/netlink.h | 6 ++
> netlink/parser.c | 7 ++
> netlink/settings.c | 7 ++
> 7 files changed, 220 insertions(+), 73 deletions(-)
Thanks (belatedly) -- queued for next release!
John
--
John W. Linville Someday the world will need a hero, and you
linville@...driver.com might be all we have. Be ready.
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